package trace-tef

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in-package search v0.2.0

A simple backend for trace, emitting Catapult/TEF JSON into a file

Install

sha256=34cfa5662b611c1e246f0fb8131ee605eeb90b359c105e882f51adc7e70878c3

sha512=ea47974a77a0ab26c58fe6d1bc898d4f3e6a5f865e4c1acb4188b9acd7ba8e7527d0ea7f2ae66574ceccc14f11127ee203aedba2be334d17b36c83dabff61261

Emit traces by talking to the tldrs daemon

Sourceval collector : out:[ `File of string ] -> unit -> Trace_core.collector

Make a collector that writes into the given output. See setup for more details.

Sourceval subscriber : out:[ `File of string ] -> unit -> Trace_subscriber.t

Make a subscriber that writes into the given output.

Sourcetype output = [

]

Output for tracing.

`File "foo" will enable tracing and print events into file named "foo". The file is only written at exit.

Sourceval setup : ?out:[ output | `Env ] -> unit -> unit

setup () installs the collector depending on out.

parameter out
can take different values:
- regular output value to specify where events go
- `Env will enable tracing if the environment variable "TRACE" is set.

If it's set to "1", then the file is "trace.json".
If it's set to "stdout", then logging happens on stdout (since 0.2)
If it's set to "stderr", then logging happens on stdout (since 0.2)
Otherwise, if it's set to a non empty string, the value is taken to be the file path into which to write.

Sourceval with_setup : ?out:[ output | `Env ] -> unit -> (unit -> 'a) -> 'a

with_setup () f (optionally) sets a collector up, calls f(), and makes sure to shutdown before exiting.